CN105298741B - The reinforced blade of wind-driven generator - Google Patents
The reinforced blade of wind-driven generator Download PDFInfo
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- CN105298741B CN105298741B CN201510737641.XA CN201510737641A CN105298741B CN 105298741 B CN105298741 B CN 105298741B CN 201510737641 A CN201510737641 A CN 201510737641A CN 105298741 B CN105298741 B CN 105298741B
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- blade
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- connecting bracket
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- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims abstract description 9
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- 239000000463 material Substances 0.000 claims description 31
- 238000010276 construction Methods 0.000 claims description 28
- 230000002787 reinforcement Effects 0.000 claims description 6
- 238000005253 cladding Methods 0.000 claims 1
- 238000010248 power generation Methods 0.000 claims 1
- 238000005452 bending Methods 0.000 description 21
- 239000003365 glass fiber Substances 0.000 description 13
- 150000001875 compounds Chemical class 0.000 description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 10
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- 125000006850 spacer group Chemical group 0.000 description 2
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/12—Blades; Blade-carrying rotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Wind Motors (AREA)
Abstract
The present invention provides a kind of reinforced blade assembly (1), including：Blade (100) is fixed to blade (100) and extends longitudinally across the connecting bracket (11,12,13) of one section of span and at least one elongated blade stiffeners (21,22,23,24,25,26) along blade, wherein, the blade stiffeners (21,22,23,24,25,26) are configured at least one end and are connected to the connecting bracket (11,12,13) to be spaced apart with the blade (100).The invention further relates to a kind of for the rotor of wind power installation, a kind of wind power installation and a kind of manufacturing method of reinforced blade assembly.
Description
Technical field
Being preferred for wind power installation, particularly for the reinforced blade of horizontal axis wind-driven generator the present invention relates to a kind of
And the manufacturing method of blade.The invention further relates to the rotors with the blade, and the wind power installation with the rotor, wind-force
Generating equipment, ocean current generating equipment or tidal current generation equipment.
Background technology
Wind energy is clean regenerative resource, fast-developing in recent years.Clean regenerative resource is wanted and conventional energy resource
(coal, oil, natural gas and large and medium-sized water power) competes, and reduces cost, it is extremely important to improve its operational efficiency.Generation at present
Boundary's wind-power electricity generation further develops to high-power, linear leaf direction.Large-scale horizontal axis wind-driven generator is in manufacture, installation and operation
When have more cost advantage.Wind-power electricity generation unit cost is reduced with the increase of the single-machine capacity of wind-power electricity generation.
Blade passes on torque and generates energy.Although be not bound by by limitation, it is believed that horizontal axis wind-driven generator generate electricity
Can and length of blade it is square directly proportional, and the increase of blade material weight and length of blade is cube directly proportional, with blade
The increase of length, increases the aerodynamic load of blade, and the weight of blade material also has greatly increased.Moreover, because leaf
The increase of piece load, blades of large-scale wind driven generator must have higher bending strength.Which increase the thickness of blade material,
Just accordingly increase the weight of blade material.
For large-scale blade, rigidity also becomes main problem.In order to ensure not to be bent to touching in extreme wind load inferior lobe point
The degree of pylon, blade must have enough bending stiffnesses, this accordingly increases the weight of blade again.
The size of blade material weight runs entire wind-driven generator, fatigue life, energy output have important shadow
It rings.
In addition, large-scale blade presses full-scale production, it is difficult to transport, also increasingly become a bottle for restricting Wind Power Development
Neck.For the following possible larger sized fan blade, the long-distance transportation of full-scale blade will be more difficult.
In addition, in the design of modern wind generator blade, blade shape also needs to obtain aerodynamic efficiency and structure
Rational balance obtains highest efficiency with the low cost of most probable.
It is not regarded as admission of prior art, Fig. 1 shows a kind of cross-sectional structure schematic diagram of example blade.Such as figure
Shown in 1, the blade 1 ' of wind-driven generator may include blade enclosure 2 and the girder construction 3 in blade enclosure 2.Shown in Fig. 1
In example, girder construction 3 is included on the inside of leaf shell fixed girder 4 respectively and in two 4 liang of girders for example, by using rectangular beam structures
End provides the anti-shearing web 5 of connection.Form the outside that aerodynamic leaf shell is coated on girder.Main bending load is by leading
Joist support is carried on a shoulder pole, and leaf shell only undertakes a small amount of bending load.The weight of the girder construction of blade, especially girder also accounts for the main portion of blade
Point.
A kind of common blade material is glass fiber compound material (GFRP).For example, blade girder and leaf shell all can be by
Glass fiber compound material is made.For the large-scale blade for using glass fiber compound material to manufacture substantially, to meet blade
Intensity and rigid requirements, blade girder to be designed very thick, and blade will weigh very much.When being run due to wind-driven generator, blade
Gravity generates alternating load, so that blade itself and unit is generated fatigue stress, the increase of leaf weight can cause blade to reach too early
To fatigue strength.This needs the intensity for improving blade, leaf weight to increased again, and accordingly so that the wheel of wind-driven generator
The construction weights such as hub, cabin, pylon increase, and eventually lead to entire wind-driven generator cost and are significantly increased, correspondingly cause wind-force
The unit cost that generates electricity rises.
In order to mitigate the weight of blade, meet intensity and rigidity requirement again, the technology method generally used at present is to use
Carbon fibre composite (CFRP) substitutes glass fiber compound material and manufactures blade girder, but carbon fibre composite price is very
It is expensive.
Therefore, the strength and stiffness of large-scale blade are improved, while mitigating the weight of blade, the cost of blade is reduced, is to work as
Preceding Wind Power Development needs urgently solve the problems, such as.
The prior art, which proposes, reinforces the rotor of wind-driven generator.
Chinese patent application publication number CN101230834A is related to a kind of stretching type wind mill wind wheel, and blade divides two-stage, in
Between central axis seat is set, make each blade at equilateral triangle with the composite material tape tensioning in streamlined section between three central axis seats
When being in different gesture positions in acceleration of gravity, the unbalanced external force in part is offset；Three central axis seats also use class with wheel hub front and back end
As stretching force strengthen wind wheel.
U.S. Patent Application Publication No. US2010/0086407A1 is related to a kind of wind turbine rotor, including one or more
A rotor blade and to reinforce the rotor stiffening elements of the rotor, wherein the rotor blade is arranged such that their energy
It is enough to be rotated relative to corresponding rotor stiffening elements around its longitudinal axis.Each rotor blade may each comprise at least two rotor leaves
Piece part, wherein outer rotor blade-section are arranged to rotate relative to internal rotor blade-section.The wind turbine rotor
Further include attachment device, for rotor stiffening elements to be connected to each other.The wind turbine rotor further includes blade stiffening elements
And spacer element, for reinforcing rotor blade, to prevent curved deflector.
The wind wheel or complex rotor structure of the above-mentioned prior art need to install tensioning line between adjacent blade to balance
Blade gravity.At runtime, blade (is turning waving direction (perpendicular to rotor blade Plane of rotation) and edgewise direction wind energy conversion system
In blades Plane of rotation) there is vibration.Due to the presence of tensioning line, the dynamic response of blade is increasingly complex.Each blade
Vibration will not be fully synchronized, therefore influence each other between blade, blade caused to be also possible to increase in the amplitude of edgewise direction,
The maximal bending moment of edgewise direction is likely to increase as well.
In addition, due between two blade sections central axis seat (open source literature of ' 834) and attachment device and interval member
Part (open source literature of ' 407), the connection between blade sections is not solid and reliable, influences the aerodynamic efficiency and structure of blade
Reasonability, and these connection structures are complicated, and blade may be caused in the strength loss of connecting portion.Especially, exist '
In 407 open source literatures, due to being installed only between two neighboring blade sections longitudinal point for the spacer element of blade stiffening elements
On position, the setting of blade stiffening elements may cause to generate excessive moment of flexure at blade sections connecting portion, cause bending rigid
The forfeiture of degree.
Accordingly, it is desirable to provide a kind of structure letter that can have higher intensity and rigidity and preferably effectively mitigate leaf weight
Single improved reinforced blade.
Invention content
Therefore, the task of the present invention is a kind of reinforced blade is provided, there is lighter weight, while meeting blade
Intensity and rigidity requirement.
According to one embodiment of present invention, a kind of reinforced blade assembly is provided, including：Blade, be fixed to blade and
The connecting bracket of one section of span and at least one elongated blade stiffeners are extended longitudinally across along blade, wherein the blade
Reinforcer is configured at least one end and is connected to the connecting bracket to be opened with the spacing with blades.
By the combination of blade stiffeners and connecting bracket, can be provided satisfactory, even with relatively light weight
The more preferably blade of bending strength and rigidity, especially higher bending stiffness.Especially, a distance is extended across in the longitudinal direction
Connecting bracket can effectively ensure the rigidity in blade stiffeners link position.
Preferably, the blade stiffeners are tensile reinforcement member and are configured to that stretch-draw prestressing force can be applied in.
It is highly preferred that the blade stiffeners are high intensity, high modulus fibre rope, such as carbon fiber rope etc..This is carried
The high intensity of wonderful weight loss effect and blade is supplied.
According to a preferred embodiment, at least one of described blade stiffeners are configured in the blade stiffeners
One end be connected to the connecting bracket, be connected directly to the blade in the other end of the blade stiffeners.
According to a preferred embodiment, at least one of described blade stiffeners are configured in the blade stiffeners
Both ends be connected to connecting bracket respectively and be roughly parallel to the blade and extend.
According to a preferred embodiment, reinforced blade assembly includes multiple blade stiffeners.According to further
Preferred embodiment, at least two in the multiple blade stiffeners are configured to approximately longitudinally be longitudinally extended along blade in alignment
And it is connected to the both sides of same connecting bracket.Additionally or alternatively, at least two constructions in the multiple blade stiffeners
At the same side that same connecting bracket is concurrently longitudinally extended and be connected to along blade.
According to a preferred embodiment, the connecting bracket includes the first stabilizer blade and first stabilizer blade in blade
It indulges the second stabilizer blade spaced upwardly and is fixedly secured to one another first stabilizer blade and the second stabilizer blade or integrally formed company
Connect element.This advantageously strengthens the rigidity of blade, the rigidity especially at connecting bracket.
According to a preferred embodiment of the present invention, the blade includes multiple blade sections, and the connecting bracket includes position
In the first stabilizer blade in one of blade sections, the second stabilizer blade in adjacent blade sections and by first stabilizer blade
The connecting element being fixedly secured to one another with the second stabilizer blade.Connecting bracket provides not only the rigidity of reinforcement as a result, moreover it is possible to strengthening phase
Being fixedly connected between adjacent blade sections.
According to a specific embodiment, the blade includes girder construction and coats the blade enclosure of the girder construction.
According to another program of the present invention, a kind of rotor for wind power installation is provided, including hub and be connected to the hub
Multiple blades, wherein at least one of the multiple blade is reinforced blade assembly according to the present invention.
According to another program of the present invention, a kind of wind power installation is provided, it is wind power plant and includes according to the present invention
The rotor.
According to another program of the present invention, a kind of manufacturing method of reinforced blade assembly is provided, is included the following steps：
Multiple blade sections are provided, wherein each blade sections are fixedly connected with or are formed with connection stabilizer blade；
Blade sections are mutually permanently connected；
The connection stabilizer blade of adjacent blade segment is mutually permanently connected by means of connecting element, is longitudinally extended along blade with being formed
Across the connecting bracket of one section of span；
Elongated blade stiffeners are mounted in the blade assembly, wherein at least one end of the blade stiffeners is solid
Surely the connection stabilizer blade is connected.
It is obvious after reading the application that a part for other features and advantages of the present invention will be those skilled in the art
, another part will be described in conjunction with the accompanying in specific implementation mode below.
Description of the drawings
Hereinafter, carry out the embodiment that the present invention will be described in detail in conjunction with attached drawing, wherein：
Fig. 1 is a kind of cross-sectional structure schematic diagram of example blade；
Fig. 2 is the stereogram of reinforced blade according to the ... of the embodiment of the present invention；
Fig. 3 A are the front views of reinforced blade according to the ... of the embodiment of the present invention；
Fig. 3 B are the side views of reinforced blade according to the ... of the embodiment of the present invention；
Fig. 4 is the partial enlarged view of reinforced blade according to the ... of the embodiment of the present invention, shows blade stiffeners and connection
The connection of holder；
Fig. 5 is the partial enlarged view of reinforced blade according to the ... of the embodiment of the present invention, shows the details of connecting bracket；
Fig. 6 A and Fig. 6 B respectively illustrate the blade girder construction of reference examples and reinforced blade according to the ... of the embodiment of the present invention
The schematic cross-section of girder construction.
Specific implementation mode
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control illustrates this hair
Bright specific implementation mode.Although it is in order to which some embodiments of the present invention are presented to provide attached drawing, attached drawing need not be by specific
The size of embodiment is drawn, and certain features can be amplified, remove or cutting is more preferably to show and explain public affairs of the invention
Open content.The phrase " in the accompanying drawings " or similar term occurred in the description need not refer to all attached drawings or example.
Be used in the description describe attached drawing certain directional terminologies, such as "upper", "lower", "left", "right", " to
On ", " downward " and other directional terminologies, it will accordingly be understood that for its normal meaning and criticize often see respective drawings when it is involved
And those of direction, this should not be construed as the concrete restriction to the technical solution of appended claims.
Term " about " in the present invention or " about " will be understood by those of ordinary skill in the art and will be according to using
The context of the term changes in a certain range.
Description describes the embodiment of the reinforced blade assembly according to the present invention for wind power plant rotor.
According to an embodiment of the invention, which is used for wind power plant, such as horizontal axis wind-driven generator, excellent
Select large-scale horizontal axis wind-driven generator.However, it is contemplated that reinforced blade assembly according to the present invention can be used for it is any
Use the suitable applications occasion of blade, such as other types of wind power installation, ocean current and tidal current generation equipment.
Although being not shown, illustrative wind power plant is for example including wind turbine and generator.Wind turbine may include having
The rotor of hub and multiple blades, preferably the multiple blade are evenly spaced arrangement around the circumferential direction of hub.Preferably, according to this hair
Bright blade can be longitudinally rotated around blade, such as blade is variablepiston.It as is known and is not shown, wind turbine can be with
Include for rotatably supporting the cabin of rotor and supporting the pylon of the cabin.Preferably, cabin, which rotatably supports, turns
The hub or shaft (not shown) of son, can be for example by means of being received transmission mechanism driving in the cabin to the rotation of rotor
Generator carries out wind-power electricity generation.In the present invention, the construction of cabin and pylon is not crucial, therefore is not repeated.In addition, root
The wind power plant of other constructions can also be correspondingly applied to according to the blade assembly and rotor of the present invention, such as without machine
Those of cabin and/or pylon.
Reinforced blade assembly 1 according to the ... of the embodiment of the present invention may include blade 100 and blade stiffening device.Preferably,
The blade stiffening device may include elongated blade stiffeners and connection structure, such as connecting bracket, as detailed below.
Blade 100 according to the ... of the embodiment of the present invention can for example be constructed as Fig. 1, including blade enclosure 2 and by blade
The girder construction 3 that shell 2 coats.As previously mentioned, in an illustrated embodiment, girder construction 3 may include a pair of of girder 4 and anti-shearing abdomen
Plate 5.As previously mentioned, blade, such as blade enclosure 2 and girder construction 3 in the shown embodiment can be by glass fibre composite wood
Material is made.It will be apparent to one skilled in the art that blade according to the ... of the embodiment of the present invention can use different blade constructions, material
And shape.It is, for example, possible to use with different girder constructions, vane airfoil profile profile.For example, blade enclosure and girder construction are by difference
Material is made or the material of blade enclosure is different from the material of girder construction.
Fig. 2-Fig. 5 shows the reinforced blade assembly 1 of the embodiment of the present invention.Blade 100 may include multiple blade sections,
In an illustrated embodiment, including three blade sections, that is, the 101, second blade sections of blade root section are in other words in other words for the first blade sections
Intermediate blade section 102, third blade section blade tip section 103 in other words.It will be understood by those skilled in the art that blade 100 can wrap
The blade sections more or less than three sections are included, this falls into the range of invention.Those skilled in the art are to be further understood that according to this hair
Bright blade can be single-piece, that is, not have multiple blade sections, this also falls into the range of invention.
Sectional-type blade according to the ... of the embodiment of the present invention can have the joint surface for being engaged with adjacent blades (not show
Go out).Can by any suitable way, such as preferred weld, riveting or material fusion at the joint surface of blade sections by leaf
Segment is engaged to form integral blade.
With continued reference to Fig. 2-Fig. 5, the illustrative examples of blade stiffening device according to the present invention are specifically described below.
As previously mentioned, the blade stiffening device may include being mounted on 2 outside of blade enclosure, especially blade windward side (figure
The arrow direction of W is the direction of wind in 3B) elongated blade stiffeners 21,22,23,24,25,26 and connection structure, at this
In be in 11,12,13 form of connecting bracket.The connection structure, such as connecting bracket are preferably directly fixed to or integrally formed to leaf
Piece shell and/or girder.
As shown in Fig. 2, in the illustrated embodiment, blade assembly 1, specifically blade stiffening device may include three fixations
The connecting bracket 11,12,13 of one section of span is extended longitudinally across to blade 100 and along blade.In an illustrated embodiment, multiple
Connecting bracket is preferably along the approximately longitudinally arrangement of blade.But it will be appreciated that blade assembly may include more or less even
Holder is connect, the number of connecting bracket preferably can be equal with the number of blade sections, but can not also be equal.The connecting bracket can
With with various shapes and/or construction, and it will be described a specific embodiment of connecting bracket below.
Fig. 3 A and Fig. 3 B respectively illustrate the front view and side view of the reinforced blade assembly of the present invention.Blade assembly 1, tool
Body blade stiffening device may include multiple elongated blade stiffeners, in an illustrated embodiment be six blade stiffeners
21,22,23,24,25,26.These blade stiffeners 21-26 is preferably connected to connecting bracket 11,12,13 at least one end.
Preferably, blade stiffeners 21,23,25 and 22,24,26 are direct or are fixedly attached to indirectly by connecting bracket
Blade 100 blade enclosure and/or girder in other words, and be spaced apart with blade enclosure by means of connecting bracket 11,12,13.
In an illustrated embodiment, blade stiffeners 21,22 longitudinally parallel are respectively connected to connect along blade at both ends
Holder 11 and connecting bracket 12, and it is preferably generally parallel to blade surface extension.Blade stiffeners 23,24 are longitudinally flat along blade
Row ground is respectively connected to connecting bracket 12 (side opposite with blade stiffeners 21,22 link positions) and connecting bracket at both ends
13, and it is preferably generally parallel to blade surface extension.Blade stiffeners 25,26 are along the longitudinal concurrently connection at one end of blade
Frame 13 (side opposite with blade stiffeners 23,24 link positions) is connected directly to leaf in the other end at tie point 14,15
Blade sections 103 in other words of piece 100.Preferably, the suitable position of tie point 14,15 is calculated according to the load of blade.At one
In unrestricted preferred embodiment, which can connect at 103 loaded center of gravity of blade sections with blade.The tie point phase
When in providing fulcrum to blade sections 103.It can reduce in this way at the tie point 14,15 of blade sections 103 to leaf at attachment device 13
The moment of flexure of piece can also reduce the thickness of blade this section of girder and shell.In an illustrated embodiment, blade stiffeners 21,
23, it 25 is approximately longitudinally longitudinally extended in alignment along blade.In an illustrated embodiment, blade stiffeners 22,24,26 are approximately longitudinally
It is longitudinally extended in alignment along blade.
In conjunction with reference to figure 3A-B and Fig. 4, it is shown that the blade connected with blade stiffeners equipped with connecting bracket.To keep leaf
Piece has a best geometry angle of attack, and blade will have different twist angle of blade at different radii along longitudinal direction.Leaf according to the ... of the embodiment of the present invention
Piece reinforcer and connecting bracket are accordingly arranged according to the blade with different leaves torsional angle.Preferably, substantially aligned along longitudinal direction
Multiple blade stiffeners can extend or parallel with it along feather rotation axis or aerodynamic centre's axis.It is real shown in
It applies in example, first group of substantially aligned blade along longitudinal direction of substantially aligned blade stiffeners 21,23 and 25 and second group along longitudinal direction
Reinforcer 22,24 and 26 can with feather rotation axis or aerodynamic centre's axis parallel within the axis both sides,
It is preferred that being symmetrical about the axis.Although in an illustrated embodiment, showing that every three blade stiffeners are substantially longitudinal right
Together, and each two blade stiffeners are arranged parallel in axis both sides, but be contemplated that other configurations, such as more or less numbers
Parallel blade stiffeners of the blade stiffeners of the substantially longitudinal alignment of purpose or greater number or only substantially longitudinal
The blade stiffeners of alignment or only parallel blade stiffeners or in one embodiment, can only there are one for example
Along the blade stiffeners of axis extension and for example positioned at blade root or the connecting bracket of blade tip.
Expanded by means of blade stiffening device according to the present invention, such as blade stiffeners 21,23 and 22,24 and connecting bracket
The cross section of blade girder, improves the bending stiffness (EI) of blade.It is rotated by means of extending longitudinally, especially with feather
Axis or the parallel blade stiffeners of aerodynamic centre's axis help to improve the bending stiffness (EI) that blade waves direction.More
Preferably, the blade stiffeners of axis both sides are arranged in, help to improve the bending that blade waves direction and edgewise direction simultaneously
Rigidity (EI).
Preferably, blade stiffeners can have preferred construction, material and shape.
In a preferred embodiment, blade stiffeners can have different cross-sectional shapes, such as preferred round,
But may be rectangle, rectangular, oval etc..It is highly preferred that blade stiffeners can have along blade longitudinally each blade sections
There is different cross sectional dimensions.The cross sectional dimensions of blade stiffeners successively decreases from blade root section to blade tip section, blade stiffeners and leaf
The distance of piece shell also can be adjusted accordingly.
It, can be at least one of which, preferably all of blade stiffeners in a preferred but unshowned embodiment
External externally-packed structure is set.Preferably, the outsourcing cross section of blade stiffeners can also have different shape, can be it is round,
Ellipse etc..It is highly preferred that the outsourcing cross section selection of blade stiffeners meets aerodynamic outsourcing shape, to reduce wind
Resistance and noise.It is particularly preferred that selection outsourcing air foil shape, makes it generate lift, contributes to the rotation of rotor blade.
In a preferred embodiment, at least one of blade stiffeners, be preferably entirely tensile reinforcement member, preferably
It is the tensile reinforcement member of high intensity, be preferably flexible tensile reinforcement member, is preferably rope.Preferably, in blade stiffeners
It is at least one, preferably be entirely fiber composite made of rope, more preferably carbon fiber rope.However, it is contemplated that
Blade stiffeners may include either other types of rope, made of material for example, same as blade, such as glass fibre
Rope.
In a preferred embodiment, stretch-draw prestressing force can be applied to blade stiffeners 21-26 so that blade girder
First first tension stress.During blade is run, prestretching stress can compression caused by partial offset load, to improve
The bearing capacity of blade.
With reference to figure 5, the embodiment of connecting bracket according to the present invention is described.Connecting bracket 11,12,13 may include first
Foot 31, with 31 longitudinally spaced the second stabilizer blade 32 opened of the first stabilizer blade and by first stabilizer blade, 31 and second stabilizer blade 32 each other
The connecting rod 33 or any suitable connecting element being fixedly connected.With continued reference to Fig. 5, connecting bracket can be in frame-like, and preferably
First stabilizer blade, 31 and second stabilizer blade 32 can be in trabeation, for example, respectively include preferably parallel post member 311-312,
321-322 and cross-member 313,323.In the preferred embodiment shown, the general frame columnar structure of connecting bracket and connection
The shape of element is conducive to reduce the aerodynamic influence on blade, such as minimizes windage.But those skilled in the art
It is readily apparent that, connecting bracket can be in other constructions or shape, this falls within the scope of the present invention.For example, stabilizer blade, post member,
The number or shape of cross-member and/or connecting element can be different.
With continued reference to Fig. 5, illustrate the manufacturing method of the reinforced blade of segmented according to an embodiment of the invention.In this hair
In a bright exemplary embodiment, blade sections 101,102 and 103 sectional makings, and can assemble at the scene.In manufacture blade sections
When, each blade sections are fixedly connected with or are integrally formed stabilizer blade.For example, the first stabilizer blade 31 is fixedly connected or is integrally formed to blade sections
101 either its second stabilizer blade of surface 32 be fixedly connected or be integrally formed to adjacent blade sections 102 or its surface.Live group
When filling blade, between blade sections 101,102 and 103, especially their girder, beam web and leaf shell can be used various suitable
Connection means, such as riveting, welding are connected to each other.It is then possible to using connecting element, such as connecting rod 33 by first and second
Foot is fixedly connected, to form the connecting bracket for extending longitudinally across one section of span along blade.In an illustrated embodiment, adjacent leaf
It is un-rotatably fixedly connected between segment, therefore ensure that the integral rigidity of blade at work.In such configuration,
Connecting bracket not only due to its (and/or in the horizontal) provides improved bending across one section of span as beam in the longitudinal direction
Rigidity also acts as the effect for the connection for improving adjacent blade segment.
Preferably, blade stiffeners 21-26 can be connected to connecting bracket (stabilizer blade) and/or blade when manufacturing blade sections
(blade sections).In alternate embodiments, blade stiffeners 21-26 can install at the scene, for example formed connecting bracket it
After install.
But it may occur to persons skilled in the art that connecting bracket can integrally with blade blade girder, the soffit of girder in other words
Plate and shell be integrally formed or connecting bracket can integrally be fixedly attached to blade in other words blade girder, beam web and
Shell, this is particularly suitable for integral blade.At this point, connecting bracket still can be because of it in the longitudinal direction (and/or in the horizontal)
Improved bending stiffness is provided as beam across one section of span.
Preferably, connecting bracket can by blade girder, beam web and the identical material of shell are formed in other words with blade,
Such as formed by glass fiber compound material, it is integrally formed more preferably by material fusion.But those skilled in the art will be bright
In vain, connecting bracket can also be formed using different materials.
In order to be particularly shown beneficial effects of the present invention, hereinafter with reference to Fig. 6 A and Fig. 6 B with comparative examples (Fig. 6 A) and
(Fig. 6 B) according to an embodiment of the invention.
Fig. 6 A central sills 1 show the blade girder construction schematic cross-section of comparative example.The upper and lower beam slab thickness of girder is t, width
It is highly the rectangular beam structures of d for b, material is glass fiber compound material, elasticity modulus E.Lead between the upper and lower beam of girder
It crosses shear web to fix, main bending load is undertaken by girder, and the weight of blade girder accounts for the major part of leaf weight.
Fig. 6 B central sills 2 show the girder construction schematic cross-section of reinforced blade according to the ... of the embodiment of the present invention.On girder, in
Beam slab thickness is T, width b, is fixed by shear web between upper, central sill, materials'use glass fiber compound material, elasticity
Modulus is E.Blade stiffeners play beam action under girder, elasticity modulus Ec, area of section S, and equivalent elastic modulus
Area (SE identical as upper beamc=TbE).Girder construction depth of section is d+D.
Due to the prolate feature of vane airfoil profile so that the rigidity for waving direction of blade is much smaller than the rigidity of edgewise direction.
And the stress for waving direction is significantly greater than the stress of edgewise direction.The load of edgewise direction is mainly influenced by blade gravity, is carried
Lotus is in cyclically-varying.Bending stiffness, bending stress, the maximum deflection of free end that beam waves direction in blade are calculated below
The weight of deformation and beam.
For ease of comparing, in the beam 2 in setting Fig. 6 B, D=d, T=t/2.It is calculated by rectangular beam structures, it is assumed that the height of beam
Degree d is more much larger than the thickness of beam slab (t, T) and web, and blade waves the bending stiffness (EI) in direction (about x-axis or x ' axis, leaf
When piece reinforcer tension stress, upper beam compression chord) it is approximately equal to respectively：
EI (beam 2)=2EI (beam 1)
The maximum bending stress under the load of direction is waved in blade to be respectively approximately equal to：
σ (beam 2)=σ (beam 1) (the glass fiber compound material position of upper beam slab)
For ease of comparing, it is assumed that the full beam of the bending stiffness (EI) of blade girder construction is identical, by evenly load.Based on cantilever beam
It calculates, the maximum flexibility that direction blade tip (free end) is waved in blade is approximately equal to respectively：
In the U.S., Sandia National Laboratories (Sandia National Laboratories) deliver in June, 2011
“The Sandia 100-meter All-glass Baseline Wind Turbine Blade:SNL100-00(Sandia
100 meters of full glass fiber compound material wind turbine blades：SNL100-00, http://windpower.sandia.gov/
Other/113779.pdf) " elasticity modulus of the glass fiber compound material E-LT-5500/EP-3 described in research report is
41.8GPa, tensile strength 972MPa, compression strength 702MPa, density 1950kg/m3。
In " the Carbon Fiber Reinforced Polymer Cables that U.Meier is delivered for 2 months 2012:Why？
Why Not？What If？" (carbon fiber composite rope：Why not？http://link.springer.com/article/
10.1007/s13369-012-0185-6) in paper, the elasticity modulus of T700s carbon fiber ropes is 165GPa, and tensile strength is
3300MPa, density 1560kg/m3。
Above-mentioned glass fiber compound material E-LT-5500/EP-3 can be used in upper, middle beam slab in the embodiment shown,
Blade stiffeners use above-mentioned T700s carbon fiber ropes.The elasticity modulus of T700s carbon fiber ropes is E-LT-5500/ as a result,
4 times of (E of EP-3c=4E), the density of T700s carbon fiber ropes is the 80% (ρ of E-LT-5500/EP-3c=0.8 ρ).
In beam 2In this way, area
The unit weight of beam 1 and beam 2 is approximately equal to respectively：
M (beam 1)=2tb ρ
By analyzing above, can obtain the blade corresponding with beam 1 of beam 2 wave direction bending stiffness, maximum stress in bend,
The comparison of maximum distortion (blade tip) and beam weight, as shown in table 1.
Table 1
| Bending stiffness | Maximum stress in bend | Maximum distortion (blade tip) | Girder weight | |
| Beam 1 (comparative example) | 1 | 1 | 1 | 1 |
| Beam 2 (present invention) | 2 | 1 | 0.5 | 0.55 |
As can be seen from Table 1, the blade girder maximum stress in bend Yu comparative example girder of the embodiment of the present invention are kept, but
Maximum distortion (blade tip) only has the 50% of the latter, and blade girder dead weight is the 55% of the latter.Moreover, the carbon fiber of the embodiment of the present invention
It is the 5% of comparative example blade girder weight to tie up rope weight.
It should be appreciated that although this specification describes according to various embodiments, not each embodiment only includes one
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say
As a whole, the technical solutions in the various embodiments may also be suitably combined for bright book, and forming those skilled in the art can be with
The other embodiment of understanding.The feature of innovation disclosed in specification is not essential, and the feature respectively innovated can be with
With other existing configurations and obtain new technical solution, this is within the scope of the present invention.
The foregoing is merely the schematical specific implementation modes of the present invention, are not limited to the scope of the present invention.It is any
Those skilled in the art, do not depart from the design of the present invention and under the premise of principle made by equivalent variations, modification and combination,
The scope of protection of the invention should all be belonged to.
Reference numerals list
1- blade assembly 26- blade stiffeners
2- blade enclosures the first stabilizer blades of 31-
3- girder constructions the second stabilizer blades of 32-
4- girder 33- connecting rods
The anti-shearing web 100- blades of 5-
The first blade sections of 11- connecting brackets 101-, blade root section
The second blade sections of 12- connecting brackets 102-, intermediate blade section
13- connecting bracket 103- third blades section, blade tip section
14- tie point 311- post members
15- tie point 312- post members
21- blade stiffeners 313- cross-members
22- blade stiffeners 321- post members
23- blade stiffeners 322- post members
24- blade stiffeners 323- cross-members
25- 1 '-blades of blade stiffeners
Claims (10)
1. a kind of reinforced blade assembly (1), including：Blade (100), be fixed to blade (100) and along blade be longitudinally extended across
The connecting bracket (11,12,13) of one section of span and at least one elongated blade stiffeners (21,22,23,24,25,26) are crossed,
Wherein, the blade stiffeners (21,22,23,24,25,26) be configured at least one end be connected to the connecting bracket (11,12,
13) to be spaced apart with the blade (100)；
The blade (100) includes multiple blade sections (101,102,103), and the connecting bracket (11,12,13) includes being located at it
In the first stabilizer blade (31) in a blade sections, the second stabilizer blade (32) in adjacent blade sections and by described first
The connecting element that stabilizer blade (31) and the second stabilizer blade (32) are fixedly secured to one another；
At least one of described blade stiffeners (21,22,23,24,25,26) are configured in one end of the blade stiffeners
It is connected to the connecting bracket, the blade (100) is connected directly in the other end of the blade stiffeners.
2. reinforced blade assembly (1) according to claim 1, wherein the blade stiffeners (21,22,23,24,
25,26) it is tensile reinforcement member and is configured to be applied in stretch-draw prestressing force.
3. reinforced blade assembly (1) according to claim 1, wherein the blade stiffeners (21,22,23,24,
25,26) it is high intensity, high modulus material.
4. reinforced blade assembly (1) according to any one of claim 1 to 3, wherein the blade stiffeners (21,
At least one of 22,23,24,25,26) be configured to the both ends of the blade stiffeners be connected to the connecting bracket of difference and
It is roughly parallel to the blade (100) extension.
5. reinforced blade assembly (1) according to any one of claim 1 to 3, including multiple blade stiffeners
(21,22,23,24,25,26), wherein：
At least two in the multiple blade stiffeners (21,22,23,24,25,26) are configured to approximately longitudinally in alignment along leaf
Piece is longitudinally extended and is connected to the both sides of same connecting bracket；And/or
At least two in the multiple blade stiffeners (21,22,23,24,25,26) are configured to concurrently longitudinally prolong along blade
Stretch and be connected to the same side of same connecting bracket.
6. reinforced blade assembly (1) according to any one of claim 1 to 3, wherein the blade (100) includes
The blade enclosure (2) of girder construction (3) and the cladding girder construction (3).
7. a kind of rotor, including hub and the multiple blades for being connected to the hub, wherein at least one of the multiple blade is
Reinforced blade assembly according to any one of claim 1 to 6.
8. a kind of wind power installation, including rotor according to claim 7.
9. a kind of generating equipment, including rotor according to claim 7, the generating equipment is wind power plant, sea
Ocean current power generation equipment or tidal current generation equipment.
10. a kind of manufacturing method of reinforced blade assembly, includes the following steps：
Multiple blade sections are provided, wherein each blade sections are fixedly connected with or are formed with connection stabilizer blade；
Blade sections are mutually permanently connected；
The connection stabilizer blade of adjacent blade segment is mutually permanently connected by means of connecting element, is extended longitudinally across along blade with being formed
The connecting bracket of one section of span；
Elongated blade stiffeners are mounted in the blade assembly, are connected wherein at least one end of the blade stiffeners is fixed
Connect the connection stabilizer blade.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510737641.XA CN105298741B (en) | 2015-11-03 | 2015-11-03 | The reinforced blade of wind-driven generator |
| PCT/CN2016/094594 WO2017076096A1 (en) | 2015-11-03 | 2016-08-11 | Reinforced blade for wind-driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510737641.XA CN105298741B (en) | 2015-11-03 | 2015-11-03 | The reinforced blade of wind-driven generator |
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|---|---|
| CN105298741A CN105298741A (en) | 2016-02-03 |
| CN105298741B true CN105298741B (en) | 2018-11-06 |
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| CN201510737641.XA Active CN105298741B (en) | 2015-11-03 | 2015-11-03 | The reinforced blade of wind-driven generator |
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| CN (1) | CN105298741B (en) |
| WO (1) | WO2017076096A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298741B (en) * | 2015-11-03 | 2018-11-06 | 周方 | The reinforced blade of wind-driven generator |
| CN107366604B (en) * | 2016-05-13 | 2023-11-10 | 周方 | Multi-segment rotor blade of wind driven generator |
| CN109083798B (en) * | 2017-06-13 | 2024-02-06 | 国网江苏省电力公司常州供电公司 | Fluid power generation device |
| CN113477976B (en) * | 2021-07-29 | 2024-06-14 | 中材科技（阜宁）风电叶片有限公司 | Blade drilling method and bracket |
| CN115750197B (en) * | 2022-12-05 | 2025-07-04 | 远大可建科技有限公司 | Internal pull rope structure of fan blade truss and installation method thereof |
| CN115752283B (en) * | 2022-12-14 | 2025-01-28 | 盛东如东海上风力发电有限责任公司 | A method and device for measuring blade deformation |
| CN116498486A (en) * | 2023-02-17 | 2023-07-28 | 清新能源科技张家口有限公司 | Sectional type cable support type wind driven generator blade |
| WO2024250633A1 (en) * | 2023-06-07 | 2024-12-12 | 远大可建科技有限公司 | Segmented wind turbine blade and transportation method therefor |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4403916A (en) * | 1980-09-02 | 1983-09-13 | Chicago Province Of The Society Of Jesus | Wind turbines |
| CA2425447C (en) * | 2003-04-17 | 2006-03-14 | Michel J. L. Auclair | Wind turbine blade unit |
| US20090140527A1 (en) * | 2007-11-30 | 2009-06-04 | General Electric Company | Wind turbine blade stiffeners |
| EP2112372A1 (en) * | 2008-04-21 | 2009-10-28 | Lm Glasfiber A/S | Wind turbine with blades supported on the leeward site |
| DE102008026474A1 (en) * | 2008-06-03 | 2009-12-10 | Mickeler, Siegfried, Prof. Dr.-Ing. | Rotor blade for a wind turbine and wind turbine |
| US20120051914A1 (en) * | 2008-10-24 | 2012-03-01 | Dehlsen James G P | Cable-stayed rotor for wind and water turbines |
| US8397382B2 (en) * | 2010-01-08 | 2013-03-19 | Sky Climber Wind Solutions Llc | Method of repairing a wind turbine blade |
| EP2383465A1 (en) * | 2010-04-27 | 2011-11-02 | Lm Glasfiber A/S | Wind turbine blade provided with a slat assembly |
| CN102434384A (en) * | 2011-11-11 | 2012-05-02 | 张向增 | Novel composite material blade of horizontal shaft wind generating set |
| CN103470445A (en) * | 2013-10-09 | 2013-12-25 | 南京风电科技有限公司 | Device for increasing rigidity of blades of wind turbine generator |
| CN104819096B (en) * | 2015-05-18 | 2018-03-20 | 苏德华 | A kind of wind turbine blade device with structure of tow line |
| CN105298740B (en) * | 2015-11-03 | 2018-11-06 | 周方 | The rotor stiffening device of wind-driven generator |
| CN105298741B (en) * | 2015-11-03 | 2018-11-06 | 周方 | The reinforced blade of wind-driven generator |
| CN205135897U (en) * | 2015-11-03 | 2016-04-06 | 周方 | Strenghthened type blade subassembly, rotor, wind power installation and power generating equipment |
-
2015
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| CN105298741A (en) | 2016-02-03 |
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